package com.atguigu.lease.web.admin.service.impl;

import com.atguigu.lease.common.minio.MinioPropertites;
import com.atguigu.lease.web.admin.service.FileService;
import io.minio.*;
import io.minio.errors.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.security.InvalidKeyException;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.UUID;

@Service
public class FileServiceImpl implements FileService {

    @Autowired
    private MinioClient minioClient;

    @Autowired
    private MinioPropertites propertites;

    @Override
    public String upload(MultipartFile file) throws ServerException, InsufficientDataException, ErrorResponseException, IOException, NoSuchAlgorithmException, InvalidKeyException, InvalidResponseException, XmlParserException, InternalException {
            boolean bucketExists = minioClient.bucketExists(
                    BucketExistsArgs.builder()
                    .bucket(propertites.getBucketName())
                            .build());
            if(!bucketExists){
                minioClient.makeBucket(
                        MakeBucketArgs.builder().
                                bucket(propertites.getBucketName())
                                .build());
                minioClient.setBucketPolicy(
                        SetBucketPolicyArgs.builder()
                                .bucket(propertites.getBucketName())
                                .config(createBucketPolicyConfig(propertites.getBucketName()))
                                .build());
            }
            String filename = new SimpleDateFormat("yyyyMMdd").format(new Date()) +
                    "/" + UUID.randomUUID() + "-" + file.getOriginalFilename();
            minioClient.putObject(PutObjectArgs.builder().
                    bucket(propertites.getBucketName()).
                    object(filename).
                    stream(file.getInputStream(), file.getSize(), -1).
                    contentType(file.getContentType()).build());

            return String.join("/", propertites.getEndpoint(), propertites.getBucketName(), filename);

    }

    private String createBucketPolicyConfig(String bucketName) {

        return """
            {
              "Statement" : [ {
                "Action" : "s3:GetObject",
                "Effect" : "Allow",
                "Principal" : "*",
                "Resource" : "arn:aws:s3:::%s/*"
              } ],
              "Version" : "2012-10-17"
            }
            """.formatted(bucketName);
    }
}
